Re: Re: 2015 Wright Stuff plane

From: William D. gowen <wdgowen_at_gmail.com>
Date: Mon, 17 Nov 2014 10:50:25 -0500

I'm not the sharpest knife in the drawer on aerodynamics but I believe
that any model with a CG behind the wing has a lifting stab. People not
involved with indoor models might say this is a bad idea but it is very
common and very successful on some models. Here's approximately where
mine are (all with rubber):

WS - 1/2" in front of TE
LPP - 1 3/4" in front of TE
A6 - 2 1/8" behind TE
F1M - 1/8" behind TE

On 11/17/2014 9:41 AM, dweigt47_at_gmail.com [Indoor_Construction] wrote:
>
> Thanks, guys, for the quick answer. I'll have to look at the Chuck
> Marcos explanation and see if I understand it.
>
>
> Lots of aviation people seem to think the horizontal stabilizer only
> pulls down to raise the nose to regulate speed and provide that pitch
> stability. That may be true, on planes with CGs in the 30% chord range
> and symmetrical stab airfoils. My casual analysis of free flight
> designs, their lifting stab airfoils, and their CGs well behind the
> trailing edge, showed me that simply isn't true. But, I've never gone
> their myself.
>
>
> It seems to me, these rearward CGs you use put the planes somewhere
> between classic conventional aircraft and classical canards. More like
> true tandem wing designs. I have basic notions of how to do that, but
> am certain I have a great deal to learn.
>
>
> I appreciate your putting up with my newbie ignorance. You do it with
> grace and polish.
>
>
> Don
>
>
Received on Mon Nov 17 2014 - 07:50:35 CET